How to calculate Support max LED Strip Length:Assumption:Your LED Strip 60LEDs/m, and each LED 0.2W, then calculate max LED Strip Length: 0.2W/LED × 60LEDs/m=12W/m, 24W(this listing)÷12W/m=2m,So, Support the LED Strip(60LEDs/m, 0.2W/LED) Length (Max)=2m